I am in my late forties and have only been shooting and carrying for 7 years or so. I started out with SF guns but made the choice to transition last year to DA/SA and didn't find it a huge hurdle... I continue to dry fire (with lots of work drawing, decocking, reholstering) several times a week... but that is just what I do anyway. I feel I have a lot of time to make up still.
With the 1911-ish SA/TS, though... I'm just not as confident as you on that. I don't have the benefit of umpteen years of experience with that kind of platform and don't feel confident that I could reach (what I consider to be) a satisfactory level of mastery with it in a reasonable amount of time. FWIW, when mixing and matching carry platforms, I see as much danger in not having that TS when you expect it to be there as I do with not expecting it to be there... Personally I just don't to risk being distracted by the (mis)operation of the gun when I have more pressing matters at hand.
To each their own, though. I am, admittedly, quite opinionated on this issue.